ABSORPTION OF CARBON DIOXIDE WITH A FREELY FALLING AQUEOUS SODIUM HYDROXIDE SOLUTION DROP

Abstract

Measurements for the rates of absorption of carbon dioxide from carbon dioxide-air mixtures with a water and an aqueous sodium hydroxide solution drop falling freely were made for Fourier number Fo = 1.53 · 10^-5 — 9.83 × 10^-5, initial concentration of aqueous sodium hydroxide solution C_BO — 0.05 — 0,4 mol/1 and feed gas concentration of carbon dioxide y = 0.05 — 1.0. Observed dimensionless rates of absorption were compared with the theoretical values by the present model and gave a good agreement with theory. The effect of drop diameter on the enhancement factor, which is a measure of the effect of chemical reaction on the rates of absorption of carbon dioxide with a freely falling alkaline solution drop, were also discussed by using numerical simulation

Keywords:

• Gas absorption
• atomization
• mass transfer
• carbon dioxide
• sodium hydroxide solution
• single drop